NAVAC 45-Degree Flaring Tool NTF66 — Eccentric Cone, Internal Clutch, Nitride Finish

The NAVAC NTF66 is a heavy-duty 45-degree eccentric-cone flaring tool with a built-in internal clutch, engineered to create consistent, leak-resistant flares on common copper tube sizes without over-torquing.

Designed for HVAC technicians and refrigeration professionals, the NTF66 combines a nitride-treated body, axial spacing and a patented rivet connection to give repeatable results across 1/4" to 3/4" tubing. Its eccentric cone geometry forms precise 45° flares while the internal clutch disengages at a controlled torque to protect fittings, tubing and the tool itself. Built for workshop and field use, the NTF66 balances durability and accuracy to speed up flaring tasks and reduce rework.

How does the eccentric cone design improve flares?

The eccentric cone shapes the tube end so the flare seats evenly against a flare nut, which improves sealing and reduces the chance of gaps. Because the cone is off-center the material cold-works in a controlled direction, producing a uniform flare lip that fits standard fittings.

• Produces true 45° flares compatible with standard flare fittings.
• Reduces uneven flare thickness and pinching.
• Works cleanly on soft copper tube without excessive deformation.

Why is the internal clutch important for field work?

The built-in clutch prevents over-torquing by disengaging once the preset resistance is reached, protecting both tool and tubing. This helps prevent split fittings and keeps flare geometry within spec, especially when operators vary in strength or when working in awkward positions.

• Limits applied torque to reduce flare failures and leaks.
• Extends tool life by avoiding overstress on threads and cone assembly.
• Useful in tight or overhead spaces where feel is inconsistent.

Which tube sizes and materials does the NTF66 handle?

The NTF66 is optimized for common HVAC copper sizes: 1/4", 5/16", 3/8", 1/2", 5/8" and 3/4" outside diameters. It is intended for soft copper tubing typically used in refrigeration and HVAC lines; using it on harder alloys should be verified for compatibility.

• Works with O.D. 1/4" through 3/4" copper tubing.
• Recommends soft copper for best flare quality.
• Color-treated finish (nitride) increases corrosion and wear resistance.

How does NAVAC ensure flare consistency and tool longevity?

The NTF66 uses axial spacing and a patented rivet connection to keep alignment and minimize play between components, producing consistent flares over many cycles. Nitride surface treatment strengthens the body against wear, and NAVAC backs the tool with a one-year warranty to support professional use.

• Patented rivet connection maintains precise alignment of moving parts.
• Nitride treatment increases hardness and resists corrosion.
• One-year warranty for defects under normal professional use.

Who is this for: The NAVAC NTF66 suits HVAC technicians, refrigeration installers, and maintenance professionals who need a reliable flaring tool for routine and on-site jobs. If you frequently prepare copper lines for flare fittings and require repeatable 45° flares with reduced risk of over-torquing, the NTF66 offers the durability and control expected in professional toolkits.